I stumbled upon this iconography site last year on Palm Sunday. This is beautiful. The Akathist Hymn is a hymn in the Eastern Catholic Church in which believers do not sit (a-kathistos) while praying in honor of Our Lady. She is the Bride Unwedded to whom this hymn is addressed, and it is traditionally prayed on the fifth Saturday of the "Great Lent." According to the Enchiridion of Indulgences of 1968, a plenary indulgence is granted--as with the Rosary--to those who recite it publicly.
Read and enjoy: Saturday of the Akathist in Icons and Hymns